Prunella vulgaris

A creeping, downy perennial with leafy runners that root at intervals, with upright flowering stems. Quite widespread on the top of Brayton Barff in North Yorkshire. Flowers between April – June. Most are native to Europe, Asia, and North Africa, but Prunella vulgaris (the Common Self-heal) is Holarctic in distribution, occurring in North America as well, and is a common lawn weed. Self-heals are low-growing plants, and thrive in moist wasteland and grass, spreading rapidly to cover the ground. They are members of the mint family and have the square stem common to mints.